Ford Transit 2015–2019 — technical service bulletin
Bulletin TSB-20-2053 · NHTSA communication 10172935 · issued Mar 2, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2015–2019
model years
5
vehicle entries
Official summary
Some 2015-2019 Transit vehicles equipped with a 3.5L or 3.7L engine may exhibit a lack of heat or uneven heat from side to side. This condition may be due to deposits from the engine coolant becoming trapped in the heater core. To correct the condition, flush the cooling system and replace the heater core.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.